As with any author's decision to use 1st person, her intention most likely -- in this story -- was to get her readers to go along for the ride into madness and cultivate a certain amount of sympathy for the narrator and her plight. The constant use of "I" puts readers in the narrator’s head and allows them to empathize with her.
Answer:
1. the houses need to be better
2. our stores
3. our streets
4. our fountains or decorations
Answer:
The third answer
Explanation: (I think it's the third answer mainly because in the excerpt it says "...Somehow the mystery of language was revealed to me." After this quote, she began to spell out water, and I think this puts emphasis on her discovery of language.